You may have come across many schematics and projects about a cell phone controlled land rover in many websites. But this is not the same. This article will show you how to make a cell phone controlled land rover without using a microcontroller. You read it right we are not going to use any kind of costly microcontroller for making the rover.
A DTMF decoder is a device which takes a signal from the headset line of a cell phone and gives a 4 bit output corresponding key pressed in the cell phone. Whenever a key is pressed in the mobile, a sum of two fixed frequency is sent as input to the decoder IC. This IC converts the number into its corresponding binary value for example if 3 is pressed its binary value 0011 is produced at the output.
do i need to put some program on this project?if ever i need to put some on it please send me a copy of your program and please inform me what kind of programming software you used.
No dear.. No need to do any program for this…
i can`t find 3.75 MHz crystal in sri lanka.then have any similar range crystal to use?
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